A few years ago I created a website as a resource for Christian Education teaching (children aged 8-12 years). I'm now a retired teacher but I have maintained the site for those who might find some of the pages or the activities helpful.
Check it out here - http://RE33.net
See also the Sunday School website I created during COVID lockdown in Melbourne Aust.
2020 which may be of interest for those who still can't meet as a Sunday School http://kidsvine.blogspot.com